Double Eccentric Flange Butterfly Valve

Specifications

Double Eccentric Flange Butterfly Valve  General:

   Double eccentrice end flanged resilient sealing butterfly valve is operated by the disc rotaing from 0 to 90.can be applied to cutoff or regulate the flow of media . Vireous enamel is available upon request .valve can be actuated by operating lever, handle wheel, electric actuator or pneumatic actuator

Professional design:

When init iating the rotary opening movement the disc is off-seated after only few degree

Of opening movement and there is very little wear and tear between seat ring and disc.

 Stainless steel seatring is rolled into the valve body by applying special rilling technology when

DN ≤ 1200.Uitrasonic spray applies seall of valve body when DN ≥1400

  Body and discmade of ductile iron which promote the impact resistance and pressure-bearing capacity; sealing ring made of rubberand valve seat’s sealing ring surface is conicalshaped , make the sealing capacity more reliable .

  Excellent corrosion protection:

  Inside electrostatic epoxyesin powder coating or vitreous enamel(upon request ), outside electrostatic epoxy resin powder coating

 Reliable health nature :

Epoxy resin powder is up to the health standard GB/T 17219-1998

Scope of application:

 Scope of app;ocation:

Scope of app;ocation:

Potable water supply and distribution, electric power plant, gas supplu, warm-air system, smelling plant ,chemical industry.

1.Design to EN593 BS5150
2.Face to face:DIN3202 F4  (EQUAL)ISO 5752 SERIES 14 
                       BS5150   (EQUAL)ISO 5752 SERIES 13 

3.Flange:DIN2501   BS4504

4.Top Flange:ISO 5211

5.Work Temperature:EPDM<120

                                  NBR<80
6.Can be 100% shut off in both direction
7.Meterial:

     NUM Name Meterial
1   Body   Ductile Iron(GGG50)
2   Seat of body   Stainless steel(304)
3   Disc seat ring   Rubber(EPDM OR NBR)
4   Disc seat ring cover   Ductile Iron(GGG50)
5   Disc   Ductile Iron(GGG50)
6   Down shaft   Stainless steel(420)
7   Disc cover   Ductile Iron(GGG50)
8   Up shaft   Stainless steel(420)
9   Bolt   Stainless steel(A2)
10   Wormgear actuator (for handwheel operation)
11   Handwheel   Ductile Iron(GGG50)
12   Bolt   Stainless steel(420)
13   Shaft end cover   Ductile Iron(GGG50)
14   Down shaft bearing   Stainless steel with  PTFE  lining
15   Up shaft bearing        Stainless steel with  PTFE  lining

16.Vave inside an outside to be FEB coating no less than 250 micron
17.Sea worthy packing

18. May the handwheel, the worm gear, electrically operated, air operated, the fluid move the operation